Evaporation-driven internal hydraulic redistribution alleviates root drought stress: Mechanisms and modeling
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F23%3A43923780" target="_blank" >RIV/62156489:43410/23:43923780 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/plphys/kiad364" target="_blank" >https://doi.org/10.1093/plphys/kiad364</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/plphys/kiad364" target="_blank" >10.1093/plphys/kiad364</a>
Alternative languages
Result language
angličtina
Original language name
Evaporation-driven internal hydraulic redistribution alleviates root drought stress: Mechanisms and modeling
Original language description
A root water uptake model verifies the occurrence of EDHR from the physical perspective. Many tree species have developed extensive root systems that allow them to survive in arid environments by obtaining water from a large soil volume. These root systems can transport and redistribute soil water during drought by hydraulic redistribution (HR). A recent study revealed the phenomenon of evaporation-driven hydraulic redistribution (EDHR), which is driven by evaporative demand (transpiration). In this study, we confirmed the occurrence of EDHR in Chinese white poplar (Populus tomentosa) through root sap flow measurements. We utilized microcomputed tomography technology to reconstruct the xylem network of woody lateral roots and proposed conceptual models to verify EDHR from a physical perspective. Our results indicated that EDHR is driven by the internal water potential gradient within the plant xylem network, which requires 3 conditions: high evaporative demand, soil water potential gradient, and special xylem structure of the root junction. The simulations demonstrated that during periods of extreme drought, EDHR could replenish water to dry roots and improve root water potential up to 38.9% to 41.6%. This highlights the crucial eco-physiological importance of EDHR in drought tolerance. Our proposed models provide insights into the complex structure of root junctions and their impact on water movement, thus enhancing our understanding of the relationship between xylem structure and plant hydraulics.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10611 - Plant sciences, botany
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Plant Physiology
ISSN
0032-0889
e-ISSN
1532-2548
Volume of the periodical
193
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
1058-1072
UT code for WoS article
001020593700001
EID of the result in the Scopus database
2-s2.0-85174409187